Planning for the weather is a good way to make your trip to Rottach-Egern relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 60°F, while the coldest months are January and February with an average of 31°F. The rainiest months in Rottach-Egern are August, June, May, and July, with each month seeing an average of 7 inches of rainfall.